illicit substanceat least once in their lifetime, only 2% of the general population is actively dependent on an illicit substance. Many more, however, use substances in a way which causes harm to themselves and/or others (misuse). In fact by far the most common forms of substance misuse are legal and not illicit – nicotine and alcohol are responsible for the large majority of health, social problems and dependency created by substance misuse. Approximately 15% of the adult population experience problems as a result of alcohol misuse, whilst many more are dependent on nicotine